CAJ | 학술논문

以含Ni 1．83％，Fe 15．25％的红土镍矿为研究对象，采用3种烟煤为还原剂，进行了红土镍矿回转窑焙烧预还原实验，研究了煤种、用量及粒度对镍矿预还原的影响。结果表明：增加烟煤用量可以提高镍、铁预还原率；固定碳相同的烟煤，挥发分越高，镍矿还原效果越好；增大烟煤粒度，镍、铁的预还原率呈下降趋势，但对于挥发分较高的烟煤，适当增加大粒度比例，可以促进镍矿的预还原。确定了最佳工艺条件为：以烟煤C为还原剂，烟煤粒度－10 mm，镍矿／烟煤质量比为100∶5，此条件下，铁金属化率和镍预还原率分别为4．53％和80．64％。
이함Ni 1．83％，Fe 15．25％적홍토얼광위연구대상，채용3충연매위환원제，진행료홍토얼광회전요배소예환원실험，연구료매충、용량급립도대얼광예환원적영향。결과표명：증가연매용량가이제고얼、철예환원솔；고정탄상동적연매，휘발분월고，얼광환원효과월호；증대연매립도，얼、철적예환원솔정하강추세，단대우휘발분교고적연매，괄당증가대립도비례，가이촉진얼광적예환원。학정료최가공예조건위：이연매C위환원제，연매립도－10 mm，얼광／연매질량비위100∶5，차조건하，철금속화솔화얼예환원솔분별위4．53％화80．64％。
With three kinds of bitumite as reductant, experimental study was conducted on the roasting and pre?reduction of nickel laterite in a rotary kiln, and the effects of varieties, addition and particle size of bitumite on the pre?reduction process were investigated. Results showed that, the addition of bitumite can increase the pre?reduction rate of nickel and iron, as for the bitumite with the same fixed carbon, the higher volatility can result in a better reduction efficiency, and a larger particle size of bitumite can lead to a downward trend in the reduction rate of nickel and iron. However, as for the bitumite with high volatility, properly increasing the proportion of larger sized bitumite seems to be beneficial to the pre?reduction. Therefore, under the determined optimum conditions for reduction with bitumite C as reductant at the particle size of -10 mm, the mass ratio of nickel laterite to bitumite at 100∶5, the metallization of iron and reduction rate of nickel reached 4.53% and 80.64%, respectively.